/*
 * This file is part of the CMaNGOS Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "VMapFactory.h"
#include "VMapManager2.h"

using namespace G3D;

namespace VMAP
{
    void VMapFactory::chompAndTrim(std::string& str)
    {
        while (str.length() > 0)
        {
            char lc = str[str.length() - 1];
            if (lc == '\r' || lc == '\n' || lc == ' ' || lc == '"' || lc == '\'')
            {
                str = str.substr(0, str.length() - 1);
            }
            else
            {
                break;
            }
        }
        while (str.length() > 0)
        {
            char lc = str[0];
            if (lc == ' ' || lc == '"' || lc == '\'')
            {
                str = str.substr(1, str.length() - 1);
            }
            else
            {
                break;
            }
        }
    }

    std::mutex m_vmapMutex;
    IVMapManager* gVMapManager = nullptr;
    Table<unsigned int, bool>* iIgnoreSpellIds = nullptr;

    //===============================================
    // result false, if no more id are found

    bool VMapFactory::getNextId(const std::string& pString, unsigned int& pStartPos, unsigned int& pId)
    {
        bool result = false;
        unsigned int i;
        for (i = pStartPos; i < pString.size(); ++i)
        {
            if (pString[i] == ',')
            {
                break;
            }
        }
        if (i > pStartPos)
        {
            std::string idString = pString.substr(pStartPos, i - pStartPos);
            pStartPos = i + 1;
            chompAndTrim(idString);
            pId = atoi(idString.c_str());
            result = true;
        }
        return result;
    }

    //===============================================
    /**
    parameter: String of map ids. Delimiter = ","
    */

    void VMapFactory::preventSpellsFromBeingTestedForLoS(const char* pSpellIdString)
    {
        if (!iIgnoreSpellIds)
            iIgnoreSpellIds = new Table<unsigned int, bool>();
        if (pSpellIdString != nullptr)
        {
            unsigned int pos = 0;
            unsigned int id;
            std::string confString(pSpellIdString);
            chompAndTrim(confString);
            while (getNextId(confString, pos, id))
            {
                iIgnoreSpellIds->set(id, true);
            }
        }
    }

    //===============================================

    bool VMapFactory::checkSpellForLoS(unsigned int pSpellId)
    {
        return !iIgnoreSpellIds->containsKey(pSpellId);
    }

    //===============================================
    // just return the instance
    IVMapManager* VMapFactory::createOrGetVMapManager()
    {
        if (!gVMapManager)
        {
            std::lock_guard<std::mutex> lock(m_vmapMutex);
            if (!gVMapManager)
                gVMapManager = new VMapManager2();              // should be taken from config ... Please change if you like :-)
        }
        return gVMapManager;
    }

    //===============================================
    // delete all internal data structures
    void VMapFactory::clear()
    {
        std::lock_guard<std::mutex> lock(m_vmapMutex);
        delete iIgnoreSpellIds;
        delete gVMapManager;

        iIgnoreSpellIds = nullptr;
        gVMapManager = nullptr;
    }
}
